GB1599655A - Gas burners - Google Patents

Description

(54) IMPROVEMENTS IN GAS BURNERS (71) We, J. TENNANT & SONS (WAR- RINGTON) LIMITED, of Hawthorne Street, Warrington, Cheshire, a British Company, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:- This invention relates to gas burners of the kind comprising a surface-combustion radiant plate or panel of refractory material, such as a bonded refractory ceramic fibre or a solid refractory, being porous or having passages therethrough for a gas/air mixture to burn at the surface of the panel which glows as a radiant heater for space heating and other domestic or industrial purposes.

It has been usual to mount such radiant panels on metal casings to the interior of which gas or a gas/air mixture is supplied to pass through and burn at the faces of the panels forming fronts or closures for the casings.

Metal casings are relatively expensive, especially if special internal shaping should be required, and they can also involve operational difficulties such as through differential expansion with refractory ceramic components.

According to the present invention, casings for supporting radiant panel burners are made, in the form of open-toothed boxes, from a refractory ceramic material. Preferably the boxes are pressed. A refractory radiant panel as above is mounted, as a lid, on the refractory box and secured by an adhesive-bound glass or other refractory fibre tape wrapped to cover the join between panel and housing, to increase the strength of a refractory mortar or cement or adhesive bond or form the join on its own.

Boxes of simple shape can be made very economically by dry or semi-dry pressing of a suitable refractory ceramic material, such as fireclay, and special internal shapes can be provided by in-situ moulding and/or separately-made components secured in the boxes by refractory cement, mortar or slip.

Internal shaping of the refractory boxes may provide for baffiing or guiding the flow, or effecting mixing, of a gas/air mixture supplied as gas which entrains air, as through a venturi injector, or as a pre-mixture of gas and air.

The accompanying drawings show a housing and burner plate by way of example, and in them: Fig. 1 is a plan view of the housing; Fig. 2 is an end view of the housing and burner plate with joining tape applied; Fig. 3 is a sectional elevation taken across Fig. 1; Fig. 4 is a side view corresponding to Fig.

2; Fig. 5 is an end view of the burner plate; Fig. 6 is a diagrammatic plan view of the burner plate; and Figs. 7 and 8 are plan and end views of a baffle.

The drawings largely speak for themselves.

The housing is a box 1 with a chamfered edge 2 that receives a layer of cement on which the burner plate 3 is bedded. Refractory adhesive bonded glass fibre tape 4 completes the joint. Gas and air enter via a venturi or other gas or gas/air supply fitting opening 5, and are guided by the baffle 6 which is cemented in place. Mounting grooves 7 are provided for the assembly as a whole.

The burner plate or plaque is generally of our known multi-pyramid form, with gas/air passages where the corners of the pyramids meet and half way along the groove between each pair of faces.

Single inlet boxes or multi-inlet boxes such as those of Fig. 5 of the drawings accompanying the provisional specification may be provided, with a single burner plate covering both sections.

Claims (3)

WHAT WE CLAIM IS:

1. A heater comprising a radiant refractory panel for surface combustion for gas and air passing through the panel, mounted as a lid on a casing in the form of an open-topped ceramic box providing for admission of air and combustible gas as such or as a mixture.

the panel being secured by an adhesivebound glass or other refractory fibre tape wrapped to cover the join between panel and casing.

2. A heater according to claim 1, wherein the casing has internal, integral or separately secured, baffles or guides for securing mixing of or guiding the gas and air.

3. A heater substantially as herein described and shown in the accompanying drawings